Crane for constructional engineering

Abstract

The utility model relates to a crane for constructional engineering, which comprises a crane support, a winding drum, a brake wheel and a brake, a forced brake roller is coaxially mounted on one side of the winding drum, and a forced brake mechanism is arranged on one side of the forced brake roller; according to the crane for constructional engineering, an existing sensor in the crane is used for detecting whether a brake fails in braking or not in real time, when the sensor monitors that a brake wheel fails and cannot be braked and stopped, the sensor can feed a failure signal back to the electric push cylinder, secondary braking protection is carried out, and a push rod in the electric push cylinder extends outwards; the rubber block is pushed into the guide groove by the push rod, the inner ring of the connecting frame is pushed into the rotating path of the T-shaped hook, so that the connecting frame is connected with the T-shaped hook, and then a composite rope connected with one side of the connecting frame is utilized to buffer and decelerate the winding drum and then completely brake to stop the falling of the heavy object; and safety accidents caused by brake wheel failure of the crane can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a crane for construction engineering. Background Art

[0002] Cranes are mainly used for handling and hoisting heavy objects in industrial production, construction, port terminals and other places; in cranes, the brake is one of the key components for the safe operation of the crane. It can quickly brake the moving parts of the crane when the crane stops running, prevent the heavy object from continuing to move due to inertia, avoid danger. The brake can also help the crane accurately place the heavy object at the designated position, improve the operation accuracy, or when the crane fails or encounters an emergency, the brake can be immediately activated to achieve emergency braking and ensure the safety of personnel and equipment.

[0003] During the use of the crane, the brake may be caused by reasons such as brake pad wear, spring relaxation or hydraulic system failure, resulting in the crane being unable to stop in time. In severe cases, the brake completely loses its function, posing a great threat to the safe operation of the crane; in view of this, this paper proposes a crane for construction engineering with secondary braking protection after the brake fails. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that during the use of the crane in the prior art, the brake may be caused by reasons such as brake pad wear, spring relaxation or hydraulic system failure, resulting in the crane being unable to stop in time. In severe cases, the brake completely loses its function, posing a great threat to the safe operation of the crane, and a crane for construction engineering is proposed.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A crane for construction engineering, including a crane support, a drum, a brake wheel and a brake. The drum is rotatably connected to the crane support. The brake wheel is coaxially and fixedly installed at one end of the drum. The brake is arranged outside the brake wheel, and the brake base is fixedly connected to the crane support. A forced braking roller is coaxially installed on one side of the drum;

[0007] A forced braking mechanism is arranged on one side of the forced braking roller. The connecting frame in the forced braking mechanism is pushed by a power source along a preset route to be close to the periphery of the cylinder in the forced braking roller, and is connected and pulled by a T-shaped hook on the rotating forced braking roller. A composite rope is connected between the connecting frame and the crane support. The T-shaped hook is vertically and fixedly installed on the periphery of the cylinder, and the cylinder is coaxially and fixedly connected to the brake wheel.

[0008] Preferably, the forced braking mechanism further includes a bottom plate fixedly connected to the crane bracket. Fixed plates and guide frames are respectively and vertically fixedly installed on both sides of the bottom plate. The connecting frame is slidably installed in the guide groove at the upper end of the guide frame. The composite rope is specifically connected between the top end of the fixed plate and the connecting frame.

[0009] Preferably, the composite rope is specifically composed of an elastic buffer rope and a plurality of steel wire ropes. The plurality of steel wire ropes are spirally wound around the periphery of the elastic buffer rope.

[0010] Preferably, one ends of the elastic buffer rope and the plurality of steel wire ropes are fixedly clamped and installed on one side of the connecting frame through a fixing ring.

[0011] Preferably, the power source is specifically composed of an electric push cylinder. The base of the electric push cylinder is fixedly installed on one side of the fixed plate.

[0012] Preferably, a rubber block is fixedly installed on one side of the connecting frame. The end of the push rod of the electric push cylinder is in contact connection with one rubber block.

[0013] Compared with the prior art, the present utility model provides a crane for construction engineering, having the following

[0014] Beneficial effects:

[0015] 1. For this crane for construction engineering, the existing sensors in the crane are used to detect in real time whether the brake fails to brake. When the sensor monitors that the brake wheel fails to brake and stop, the sensor will feedback the failure signal to the electric push cylinder for secondary braking protection. The push rod in the electric push cylinder is extended outwards, and the push rod pushes the rubber block into the guide groove, and the inner ring of the connecting frame is pushed into the rotation path of the T-shaped hook, so as to complete the connection between the connecting frame and the T-shaped hook. Then, by using the composite rope connected to one side of the connecting frame, the reel is first buffered and decelerated, and then the heavy object is completely braked and stopped from falling, which can effectively avoid the safety accidents caused by the failure of the brake wheel of the crane.

[0016] 2. For this crane for construction engineering, through the composite rope in which a plurality of steel wire ropes are spirally wound around the periphery of the elastic buffer rope, when the brake fails, the elastic deformation of the elastic buffer rope can first slow down the impact force and speed of the heavy object falling, and when the plurality of steel wire ropes are gradually tightened, the friction force generated between the steel wire ropes and the elastic buffer rope can weaken the impact force and speed of the heavy object falling, which can prevent the safety accidents caused by too fast speed. Until the high mechanical strength steel wire ropes are tightened, the steel wire ropes make the forced braking roller unable to continue rotating through the connecting frame and the T-shaped hook, so that the heavy object connected below the reel cannot fall, achieving the purpose of first buffering and decelerating and then completely braking. Description of the Drawings

[0017] Figure 1 Schematic structural diagram of a crane for construction engineering proposed by the present utility model;

[0018] Figure 2 Partial structural schematic diagram of a crane for construction engineering proposed by the present utility model;

[0019] Figure 3 Schematic structural diagram of a composite rope in a crane for construction engineering proposed by the present utility model.

[0020] In the figure: 1, drum; 2, brake wheel; 3, brake; 4, forced braking roller; 401, cylinder; 402, T-shaped hook; 5, forced braking mechanism; 501, bottom plate; 502, fixing plate; 503, electric push cylinder; 504, guide frame; 505, connecting frame; 506, rubber block; 507, composite rope; 50701, elastic buffer rope; 50702, steel wire rope; 508, fixing ring. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0023] Referring to the attached Figures 1-3 , a crane for construction engineering includes a crane support. A drum 1 is rotatably installed on the crane support. A brake wheel 2 is coaxially and fixedly installed on one side of the drum 1. A brake 3 is arranged on the periphery of the brake wheel 2, and the base of the brake 3 is fixedly connected to the crane support;

[0024] As is well known, a sensor for sensing the rotational speed of the drum is installed in the crane. During the operation of the crane, it is necessary to accurately master parameters such as the rotational speed of the drum to ensure safe and efficient operation. The sensor for sensing the rotational speed of the drum 1 can monitor the rotational speed of the drum in real time, providing important data for the control system of the crane. In this way, precise control of the lifting and lowering speeds of the crane can be achieved, preventing safety accidents caused by too fast or too slow speeds. At the same time, by monitoring the rotational speed of the drum, abnormal conditions during the operation of the drum, such as jamming and slipping, can be detected in a timely manner for timely repair and maintenance.

[0025] It should be added that during the use of the crane, the brake 3 may be caused by reasons such as brake pad wear, spring relaxation, or hydraulic system failure, resulting in the crane being unable to stop in time. In severe cases, the brake 3 completely loses its function, posing a great threat to the safe operation of the crane. In view of this, a forced braking roller 4 is coaxially installed on one side of the drum 1 in this article, and a cooperating forced braking mechanism 5 is provided on one side of the forced braking roller 4.

[0026] In this embodiment, the forced braking roller 4 is specifically composed of a cylinder 401 and a T-shaped hook 402. The cylinder 401 is coaxially and fixedly connected to the brake wheel 2, and the T-shaped hook 402 is vertically and fixedly installed on the periphery of the cylinder 401. The connecting frame 505 in the forced braking mechanism 5 is pushed by a power source along a preset route for approaching the periphery of the cylinder 401 in the forced braking roller 4, and is connected and pulled by the T-shaped hook 402 on the rotating forced braking roller 4 to achieve the purpose of traction limit braking.

[0027] In this embodiment, the forced braking mechanism 5 further includes a bottom plate 501, which is fixedly connected to the crane support. Fixed plates 502 and guide frames 504 are respectively and vertically fixedly installed on both sides of the bottom plate 501. The guide frame 504 is arranged closer to the side of the cylinder 401 relative to the fixed plate 502. The connecting frame 505 is slidably installed in the guide groove at the upper end of the guide frame 504. A rubber block 506 is fixedly installed on one side of the connecting frame 505, and the rubber block 506 is also fitted and connected to the guide groove of the guide frame 504. The connecting frame 505 is specifically made of stainless steel with high mechanical strength and poor bending performance. The rubber block 506 is mainly used to support the connecting frame 505 horizontally along the length of the connecting frame 505 when the connecting frame 505 moves outward close to the cylinder 401 and completely extends out of the guide groove in the guide frame 504 until the rotating T-shaped hook 402 hooks the inner circle of the connecting frame 505. Then, by using the flexibility and deformable function of the rubber block 506, the connecting frame 505 that can be hooked and pulled can be smoothly pulled out of the guide groove.

[0028] A composite rope 507 is connected between the top end of the fixed plate 502 and the connecting frame 505. The composite rope 507 is mainly used to pull and limit the forced braking roller 4 through the connecting frame 505. The power source is specifically composed of an electric push cylinder 503. The base of the electric push cylinder is fixedly installed on one side of the fixed plate 502. The end of the push rod of the electric push cylinder 503 is in contact connection with a rubber block 506. In the initial state, the connecting frame 505 is arranged in the guiding groove and is far from the T-shaped hook 402. The T-shaped hook 402 can rotate normally. However, when the sensor detects that the brake 3 fails to brake and cannot stop the brake wheel 2 in time, the sensor will feedback the failure signal to the electric push cylinder 503, extend the push rod in the electric push cylinder 503 outward, and push the rubber block 506 into the guiding groove by the push rod, and push the inner ring of the connecting frame 505 into the rotation path of the T-shaped hook 402, so as to complete the connection between the connecting frame 505 and the T-shaped hook 402.

[0029] In this embodiment, the composite rope 507 is specifically composed of an elastic buffer rope 50701 and three steel wire ropes 50702. The elastic buffer rope 50701 is made of a polyurethane rope. The three steel wire ropes 50702 are spirally wound around the periphery of the elastic buffer rope 50701, and the two ends of the steel wire rope 50702 and the elastic buffer rope 50701 are fixedly connected respectively. That is, the length of the steel wire rope 50702 is greater than the length of the elastic buffer rope 50701. One end of the elastic buffer rope 50701 and the three steel wire ropes 50702 is fixedly clamped and installed on one side of the connecting frame 505 through a fixing ring 508, and the other end of the elastic buffer rope 50701 and the three steel wire ropes 50702 is fixedly connected to the fixed plate 502;

[0030] When the composite rope 507 is pulled and stretched, first, both ends of the elastic buffer rope 50701 and the steel wire rope 50702 are stressed simultaneously. However, the elastic buffer rope 50701 mainly slows down the impact force and speed of the heavy object falling by its own certain degree of elastic deformation. When the steel wire rope 50702 changes from a completely spiral state to being tightened and twisted, the steel wire rope 50702 mainly weakens the impact force and speed of the heavy object falling through the friction force generated between the three steel wire ropes 50702 and the elastic buffer rope 50701. Until the steel wire rope 50702 is completely in a tightened state and cannot be stretched, the steel wire rope 50702 makes the forced braking roller 4 unable to rotate continuously through the connecting frame 505 and the T-shaped hook 402, so that the heavy object connected below the reel 1 cannot fall, achieving the purpose of first buffering and decelerating and then completely braking. That is, the forced braking mechanism 5 has the function of first buffering and decelerating and then completely braking to stop the heavy object from falling through the composite rope 507, and can effectively avoid safety accidents caused by the failure of the brake wheel 2 of the crane.

[0031] In the present utility model, when a sensor in a crane detects that the brake 3 fails to brake and cannot stop the brake wheel 2 in time, the sensor will feedback the failure signal to the electric push cylinder 503 for secondary braking protection. The push rod in the electric push cylinder 503 is extended outwards, and the rubber block 506 is pushed into the guide groove by the push rod, and the inner ring of the connecting frame 505 is pushed into the rotation path of the T-shaped hook 402, thereby completing the connection between the connecting frame 505 and the T-shaped hook 402. Then, the compound rope 507 connected to one side of the connecting frame 505 is used to first buffer and decelerate the drum 1, and then completely brake to stop the heavy object from falling, which can effectively avoid safety accidents caused by the failure of the brake wheel 2 of the crane.

[0032] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes, should be covered within the protection scope of the present utility model.

Claims

1. A crane for construction engineering, comprising a crane support, a drum (1), a brake wheel (2) and a brake (3), wherein the drum (1) is rotatably connected to the crane support, the brake wheel (2) is coaxially and fixedly installed at one end of the drum (1), the brake (3) is arranged around the brake wheel (2), and the base of the brake (3) is fixedly connected to the crane support, and is characterized in that: On one side of the drum (1), a forced braking roller (4) is coaxially installed; On one side of the forced braking roller (4), a forced braking mechanism (5) is provided. The connecting frame (505) in the forced braking mechanism (5) is pushed by a power source along a preset route, for approaching the periphery of the cylinder (401) in the forced braking roller (4), and the T-shaped hook (402) on the rotating forced braking roller (4) is used to connect and tow the connecting frame (505). A composite rope (507) is connected between the connecting frame (505) and the crane support. The T-shaped hook (402) is vertically and fixedly installed on the periphery of the cylinder (401), and the cylinder (401) is coaxially and fixedly connected to the brake wheel (2).

2. The crane for construction engineering according to claim 1, characterized in that: The forced braking mechanism (5) further includes a bottom plate (501) fixedly connected to the crane support. On both sides of the bottom plate (501), a fixing plate (502) and a guide frame (504) are respectively vertically and fixedly installed. The connecting frame (505) is slidably installed in the guide groove at the upper end of the guide frame (504). The composite rope (507) is specifically connected between the top end of the fixing plate (502) and the connecting frame (505).

3. The crane for construction engineering according to claim 1, wherein: The composite rope (507) is specifically composed of an elastic buffer rope (50701) and a plurality of steel wires (50702). The plurality of steel wires (50702) are spirally wound around the periphery of the elastic buffer rope (50701).

4. The crane for construction engineering according to claim 3, characterized in that: One ends of the elastic buffer rope (50701) and the plurality of steel wires (50702) are fixedly clamped and installed on one side of the connecting frame (505) through a fixing ring (508).

5. The crane for construction engineering according to claim 2, wherein: The power source is specifically composed of an electric push cylinder (503). The base of the electric push cylinder (503) is fixedly installed on one side of the fixing plate (502).

6. The crane for construction engineering according to claim 5, wherein: A rubber block (506) is fixedly installed on one side of the connecting frame (505). The end of the push rod of the electric push cylinder (503) is in contact connection with a rubber block (506).

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